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dma: imx-sdma: Use struct for driver data 

Use a struct type instead of an enum type for distinguishing between
different versions. This makes it simpler to handle multiple differences
without cluttering the code with comparisons for certain devtypes.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Sascha Hauer 2013-08-20 10:04:31 +02:00 committed by Vinod Koul
parent 023bf55f1c
commit 17bba72f8f
1 changed files with 33 additions and 30 deletions
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63
drivers/dma/imx-sdma.c
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@ -305,9 +305,9 @@ struct sdma_firmware_header {
u32 ram_code_size;
};
enum sdma_devtype {
IMX31_SDMA, /* runs on i.mx31 */
IMX35_SDMA, /* runs on i.mx35 and later */
struct sdma_driver_data {
int chnenbl0;
int num_events;
};
struct sdma_engine {
@ -316,8 +316,6 @@ struct sdma_engine {
struct sdma_channel channel[MAX_DMA_CHANNELS];
struct sdma_channel_control *channel_control;
void __iomem *regs;
enum sdma_devtype devtype;
unsigned int num_events;
struct sdma_context_data *context;
dma_addr_t context_phys;
struct dma_device dma_device;
@ -325,15 +323,26 @@ struct sdma_engine {
struct clk *clk_ahb;
spinlock_t channel_0_lock;
struct sdma_script_start_addrs *script_addrs;
const struct sdma_driver_data *drvdata;
};
struct sdma_driver_data sdma_imx31 = {
.chnenbl0 = SDMA_CHNENBL0_IMX31,
.num_events = 32,
};
struct sdma_driver_data sdma_imx35 = {
.chnenbl0 = SDMA_CHNENBL0_IMX35,
.num_events = 48,
};
static struct platform_device_id sdma_devtypes[] = {
{
.name = "imx31-sdma",
.driver_data = IMX31_SDMA,
.driver_data = (unsigned long)&sdma_imx31,
}, {
.name = "imx35-sdma",
.driver_data = IMX35_SDMA,
.driver_data = (unsigned long)&sdma_imx35,
}, {
/* sentinel */
}
@ -341,8 +350,8 @@ static struct platform_device_id sdma_devtypes[] = {
MODULE_DEVICE_TABLE(platform, sdma_devtypes);
static const struct of_device_id sdma_dt_ids[] = {
{ .compatible = "fsl,imx31-sdma", .data = &sdma_devtypes[IMX31_SDMA], },
{ .compatible = "fsl,imx35-sdma", .data = &sdma_devtypes[IMX35_SDMA], },
{ .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
{ .compatible = "fsl,imx35-sdma", .data = &sdma_imx35, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sdma_dt_ids);
@ -354,8 +363,7 @@ MODULE_DEVICE_TABLE(of, sdma_dt_ids);
static inline u32 chnenbl_ofs(struct sdma_engine *sdma, unsigned int event)
{
u32 chnenbl0 = (sdma->devtype == IMX31_SDMA ? SDMA_CHNENBL0_IMX31 :
SDMA_CHNENBL0_IMX35);
u32 chnenbl0 = sdma->drvdata->chnenbl0;
return chnenbl0 + event * 4;
}
@ -729,7 +737,7 @@ static int sdma_config_channel(struct sdma_channel *sdmac)
sdmac->per_addr = 0;
if (sdmac->event_id0) {
if (sdmac->event_id0 >= sdmac->sdma->num_events)
if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
return -EINVAL;
sdma_event_enable(sdmac, sdmac->event_id0);
}
@ -1208,19 +1216,6 @@ static int __init sdma_init(struct sdma_engine *sdma)
int i, ret;
dma_addr_t ccb_phys;
switch (sdma->devtype) {
case IMX31_SDMA:
sdma->num_events = 32;
break;
case IMX35_SDMA:
sdma->num_events = 48;
break;
default:
dev_err(sdma->dev, "Unknown sdma type %d. aborting\n",
sdma->devtype);
return -ENODEV;
}
clk_enable(sdma->clk_ipg);
clk_enable(sdma->clk_ahb);
@ -1247,7 +1242,7 @@ static int __init sdma_init(struct sdma_engine *sdma)
MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control));
/* disable all channels */
for (i = 0; i < sdma->num_events; i++)
for (i = 0; i < sdma->drvdata->num_events; i++)
writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i));
/* All channels have priority 0 */
@ -1329,6 +1324,17 @@ static int __init sdma_probe(struct platform_device *pdev)
int i;
struct sdma_engine *sdma;
s32 *saddr_arr;
const struct sdma_driver_data *drvdata = NULL;
if (of_id)
drvdata = of_id->data;
else if (pdev->id_entry)
drvdata = (void *)pdev->id_entry->driver_data;
if (!drvdata) {
dev_err(&pdev->dev, "unable to find driver data\n");
return -EINVAL;
}
sdma = kzalloc(sizeof(*sdma), GFP_KERNEL);
if (!sdma)
@ -1337,6 +1343,7 @@ static int __init sdma_probe(struct platform_device *pdev)
spin_lock_init(&sdma->channel_0_lock);
sdma->dev = &pdev->dev;
sdma->drvdata = drvdata;
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
@ -1386,10 +1393,6 @@ static int __init sdma_probe(struct platform_device *pdev)
for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++)
saddr_arr[i] = -EINVAL;
if (of_id)
pdev->id_entry = of_id->data;
sdma->devtype = pdev->id_entry->driver_data;
dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask);
dma_cap_set(DMA_CYCLIC, sdma->dma_device.cap_mask);